CVE-2024-54683

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  3. CVE-2024-54683

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

I

n the Linux kernel, the following vulnerability has been resolved: netfilter: IDLETIMER: Fix for possible ABBA deadlock Deletion of the last rule referencing a given idletimer may happen at the same time as a read of its file in sysfs: | ====================================================== | WARNING: possible circular locking dependency detected | 6.12.0-rc7-01692-g5e9a28f41134-dirty #594 Not tainted | ------------------------------------------------------ | iptables/3303 is trying to acquire lock: | ffff8881057e04b8 (kn->active#48){++++}-{0:0}, at: __kernfs_remove+0x20 | | but task is already holding lock: | ffffffffa0249068 (list_mutex){+.+.}-{3:3}, at: idletimer_tg_destroy_v] | | which lock already depends on the new lock. A simple reproducer is: | #!/bin/bash | | while true; do | iptables -A INPUT -i foo -j IDLETIMER --timeout 10 --label "testme" | iptables -D INPUT -i foo -j IDLETIMER --timeout 10 --label "testme" | done & | while true; do | cat /sys/class/xt_idletimer/timers/testme >/dev/null | done Avoid this by freeing list_mutex right after deleting the element from the list, then continuing with the teardown.

References
Link Resource
https://git.kernel.org/stable/c/45fe76573a2557f632e248cc141342233f422b9a Patch
https://git.kernel.org/stable/c/8c2c8445cda8f59c38dec7dc10509bcb23ae26a0 Patch
https://git.kernel.org/stable/c/f36b01994d68ffc253c8296e2228dfe6e6431c03 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*
History

16 Jan 2025, 15:18

Type Values Removed Values Added
First Time Linux linux Kernel
Linux
CWE CWE-667
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
References () https://git.kernel.org/stable/c/45fe76573a2557f632e248cc141342233f422b9a - () https://git.kernel.org/stable/c/45fe76573a2557f632e248cc141342233f422b9a - Patch
References () https://git.kernel.org/stable/c/8c2c8445cda8f59c38dec7dc10509bcb23ae26a0 - () https://git.kernel.org/stable/c/8c2c8445cda8f59c38dec7dc10509bcb23ae26a0 - Patch
References () https://git.kernel.org/stable/c/f36b01994d68ffc253c8296e2228dfe6e6431c03 - () https://git.kernel.org/stable/c/f36b01994d68ffc253c8296e2228dfe6e6431c03 - Patch
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: IDLETIMER: Corrección de un posible bloqueo de ABBA La eliminación de la última regla que hace referencia a un temporizador inactivo determinado puede ocurrir al mismo tiempo que una lectura de su archivo en sysfs: | ======================================================== | ADVERTENCIA: se detectó una posible dependencia de bloqueo circular | 6.12.0-rc7-01692-g5e9a28f41134-dirty #594 No contaminado | ------------------------------------------------------ | iptables/3303 está intentando adquirir el bloqueo: | ffff8881057e04b8 (kn->active#48){++++}-{0:0}, at: __kernfs_remove+0x20 | | pero la tarea ya tiene el bloqueo: | ffffffffa0249068 (list_mutex){+.+.}-{3:3}, at: idletimer_tg_destroy_v] | | cuyo bloqueo ya depende del nuevo bloqueo. Un reproductor simple es: | #!/bin/bash | | mientras es verdadero; hacer | iptables -A INPUT -i foo -j IDLETIMER --timeout 10 --label "testme" | iptables -D INPUT -i foo -j IDLETIMER --timeout 10 --label "testme" | hecho & | mientras es verdadero; hacer | cat /sys/class/xt_idletimer/timers/testme >/dev/null | Evite esto liberando list_mutex inmediatamente después de eliminar el elemento de la lista y luego continúe con el desmontaje.

11 Jan 2025, 13:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-01-11 13:15

Updated : 2025-10-01 20:17

NVD link : CVE-2024-54683

Mitre link : CVE-2024-54683

CVE.ORG link : CVE-2024-54683

JSON object : View

Products Affected

linux

CWE
CWE-667

Improper Locking